UPDATE: Robert Kirkman has officially confirmed the spinoff title as Fear the Walking Dead:

The Walking Dead Season 5 may come to a frightful close this Sunday with the AMC horror-drama’s latest attempt to “Conquer” airwaves, but the wait for fresh zombie action won’t prove nearly as long. Not only will we have the untitled companion series spinoff in late summer, but now it seems our first promo trailer will arrive as early as Sunday’s finale.

Per AMC’s official announcement, a brief spot for The Walking Dead’s prequel companion series will air during the 90-minute run of Sunday’s Season 5 finale “Conquer,” though how much we’ll actually see of the new series remains to be seen. Production on the first six-episode season is already underway in Vancouver, the first few photos of which have already emerged.

Still untitled (most rumors put the moniker as Fear the Walking Dead), the companion series to AMC’s monster smash will follow its predecessor with six episodes for its first season, with a second season of regular length already ordered for 2016. Additionally, while the companion series will begin as a prequel to the zombie apocalypse, creator Robert Kirkman has expressed that the two series will eventually catch up to one another.

The Last Airbender star Cliff Curtis will lead the cast as divorced teacher Sean Cabrera, with Gone Girl star Kim Dickens as high school guidance counselor Nancy. Also cast in the role of her two children from a previous marriage are Harry Potter and the Half-Blood Prince star Frank Dillane and AMC pilot Galyntine star Alycia Debnam Carey.

Walking Dead executive producers Kirkman, Gale Anne Hurd and David Alpert will all take part in the new L.A.-set series, while Sons of Anarchy and Low Winter Sun vet Dave Erickson will both co-write and executive produce, and Adam Davidson will direct the pilot.

We’ve also heard that The Walking Dead Season 6 might feature a character connected to the companion series, but what should we expect to learn from the first companion series promo this Sunday night?